Null object Dao
Created NullQuotaDao base
Unique instance to NullQuotaDao
Private constructor to Dao
Override of insertQuotasById
Override of deleteQuotasFromCongressman
Update Javadoc
Basic Gitignore
Removed Class files
Basic NullUrlDao
Unique instance of NullUrlDao
Overides checkEmptyLocalDb
Overrides insertUrl
Overrides deleteUrl
Overrides getUrl
Merge branch 'gof_design_patterns' into null_object_pattern